Industeel URANUS® 47N+ 25 Cr Super Duplex Stainless Steel with PREN = 40

Industeel URANUS® 47N+ 25 Cr Super Duplex Stainless Steel with PREN = 40 Product Information -:- For detailed product information, please contact sales. -: Industeel URANUS® 47N+ 25 Cr Super Duplex Stainless Steel with PREN = 40 Synonyms -:- For detailed product information, please contact sales. -:

Industeel URANUS® 47N+ 25 Cr Super Duplex Stainless Steel with PREN = 40 Product Information -:- For detailed product information, please contact sales. -: **Product Name:** Industeel URANUS® 47N+ (25% Cr Super Duplex Stainless Steel, PREN = 40) **Introduction:** Industeel URANUS® 47N+ is a **super duplex stainless steel** representing the pinnacle of the URANUS® duplex family. Engineered for extreme service, it combines a high-chromium alloy base with optimized nitrogen content to achieve an unparalleled balance of **exceptional strength and extraordinary corrosion resistance**. With a guaranteed Pitting Resistance Equivalent Number (PREN) of ≥ 40, it is designed to operate reliably in the most aggressive environments where standard duplex (e.g., 2205) and even high-grade austenitic steels reach their limits. It offers a cost-effective alternative to nickel-based alloys for numerous demanding applications. **Key Features:** * **Extreme Corrosion Resistance:** Exceptionally high resistance to pitting, crevice corrosion, and stress corrosion cracking (SCC) in high-chloride, acidic, and sour (H₂S-containing) environments, as quantified by its PREN ≥ 40. * **Very High Mechanical Strength:** Delivers superior yield and tensile strength (nearly triple that of 316L), allowing for significant weight reduction and design optimization in high-pressure systems. * **Excellent Erosion-Corrosion Resistance:** The combination of high hardness and inherent corrosion resistance makes it ideal for applications involving high flow rates, sand, or particulate matter. * **Optimized for Critical Service:** Manufactured under stringent controls to ensure a stable austenite-ferrite microstructure, minimizing the risk of harmful intermetallic phases for maximum reliability in welded fabrications. --- **1. Chemical Composition (Typical Weight % - Industeel Specification)** The composition is precisely balanced to maximize performance while maintaining structural stability. | Element | Content (%) | Element | Content (%) | | :------------- | :------------ | :------------- | :---------- | | Chromium (Cr) | 24.5 - 25.5 | Nickel (Ni) | 6.5 - 8.0 | | Molybdenum (Mo)| 3.0 - 4.0 | Nitrogen (N) | 0.20 - 0.30 | | Manganese (Mn) | ≤ 1.5 | Copper (Cu) | 0.50 - 1.50 | | Silicon (Si) | ≤ 0.50 | Carbon (C) | ≤ 0.030 | | Phosphorus (P) | ≤ 0.030 | Sulfur (S) | ≤ 0.015 | | Tungsten (W) | 0.50 - 1.00 | | | | **Iron (Fe)** | **Balance** | | | **Key Alloying Note:** The addition of **Tungsten (W)** further enhances pitting and crevice corrosion resistance, particularly in acidic chloride environments. **PREN Calculation:** PREN = %Cr + 3.3(%Mo + 0.5%W) + 16(%N) ≥ **40** --- **2. Physical & Mechanical Properties (Typical at Room Temperature - Solution Annealed)** | Property | Value / Range | | :-------------------------------------------- | :-------------------------------- | | Density | 7.80 g/cm³ | | Melting Range | 1400 - 1450 °C | | Thermal Conductivity (20°C) | 17 W/m·K | | Coefficient of Thermal Expansion (20-100°C) | 12.5 x 10⁻⁶ /K | | Modulus of Elasticity | 200 GPa | | **Tensile Strength (Rm)** | **800 - 1000 MPa** | | **Yield Strength (Rp0.2)** | **≥ 550 MPa** | | **Elongation (A in 50mm)** | **≥ 25 %** | | Hardness (Brinell) | 270 - 320 HBW | | **Impact Toughness (Charpy V-notch, min.)** | **≥ 80 J at -40°C** | | **Critical Pitting Temperature (CPT) - ASTM G48** | **Typically ≥ 65°C** | | **Critical Crevice Temperature (CCT) - ASTM G48** | **Typically ≥ 40°C** | | Maximum Recommended Service Temperature | ≈ 250°C (to avoid embrittlement) | --- **3. Product Forms & Applications** **Available Product Forms:** * Heavy Plate and Sheet * Seamless and Welded Pipe & Tube * Bar, Wire, and Forging Blooms * Custom Forgings (for critical components) **Primary Applications (Extreme Service):** URANUS® 47N+ is specified for the most corrosive and demanding applications across industries: * **Oil & Gas - Deepwater/Subsea:** Christmas trees, manifolds, flowlines, risers, and umbilicals in cold, high-pressure seawater with cathodic protection. * **Oil & Gas - Severe Sour Service:** Downhole tubing, wellhead components, and process equipment in fields with very high H₂S, CO₂, and chloride content. * **Chemical & Petrochemical Processing:** Reactors, columns, and heat exchangers handling concentrated sulfuric and phosphoric acids, chloride salts, and aggressive organic chemicals. * **Marine & Offshore:** Seawater piping systems, high-pressure pumps, heat exchangers, and shafts in naval and commercial vessels. * **Desalination:** High-pressure pumps, energy recovery devices, and RO membranes in seawater reverse osmosis (SWRO) plants. * **Pulp & Paper:** Digester pre-heaters and liquor heaters in kraft pulp mills. * **Pollution Control:** Scrubbers, ducting, and fans in highly corrosive flue gas desulfurization (FGD) systems. * **Aquaculture:** Cage systems and components in exposed marine environments. --- **4. International Standards & Approvals** URANUS® 47N+ corresponds to high-grade super duplex standard specifications. | Standard Type | Standard Number & Designation | Notes | | :------------------ | :--------------------------------------------------------------------------------------------------------------------------- | :-------------------------------------------------------------------- | | **Unified Numbering System (UNS)** | **S32750** (Primary equivalent - 25Cr Super Duplex) | The most common global standard for this alloy class (e.g., SAF 2507®). | | **EN / EURONORM (Europe)** | **1.4410** (Common material number for S32750) | Standard European designation for 25% Cr super duplex. | | **ASTM (USA)** | **ASTM A240** S32750 (Plate/Sheet)
**ASTM A182** F53 (Forgings)
**ASTM A789/A790** S32750 (Pipe & Tube) | The key ASTM procurement standards. | | **NACE MR0175 / ISO 15156** | **Fully Compliant** | Approved for sour service under strict hardness control (typically ≤ 36 HRC). Requires solution annealing and quenching. | | **Specialized Approvals** | **DNV, ABS, Lloyds** for offshore and marine applications.
**PED 2014/68/EU** (Pressure Equipment Directive) compliance. | Often supplied with project-specific certifications. | | **Key Procurement Specification** | **Proprietary Industeel URANUS® 47N+ Technical Datasheet** | The definitive source for its enhanced guaranteed properties beyond minimum standards. | **Critical Procurement & Fabrication Note:** URANUS® 47N+ is a **high-performance alloy requiring expert handling**. Procurement must specify "Industeel URANUS® 47N+" alongside UNS S32750 to ensure the receipt of material with the enhanced characteristics. The **Manufacturer's Test Certificate is critical** and must include heat-specific data: full chemical analysis (for PREN calculation), ferrite content (aim: 35-55%), phase balance verification, and typically results from pitting corrosion tests (CPT/CCT). Welding is a critical operation and **must** use **over-matching super duplex or nickel-based filler metals** (e.g., ER2594 or Ni-based 625) under strictly controlled procedures to maintain corrosion resistance and toughness in the weld zone. Post-weld heat treatment is generally not recommended. -:- For detailed product information, please contact sales. -: Industeel URANUS® 47N+ 25 Cr Super Duplex Stainless Steel with PREN = 40 Specification Dimensions Size： Diameter 20-1000 mm Length <7276 mm Size:We can customized as required Standard： Per your request or drawing We can customized as required Properties（Theoretical） Chemical Composition -:- For detailed product information, please contact sales. -: Industeel URANUS® 47N+ 25 Cr Super Duplex Stainless Steel with PREN = 40 Properties -:- For detailed product information, please contact sales. -:

Applications of Industeel URANUS® 47N+ 25 Cr Super Duplex Stainless Steel with PREN = 40 -:- For detailed product information, please contact sales. -: Chemical Identifiers Industeel URANUS® 47N+ 25 Cr Super Duplex Stainless Steel with PREN = 40 -:- For detailed product information, please contact sales. -:

Packing of Industeel URANUS® 47N+ 25 Cr Super Duplex Stainless Steel with PREN = 40 -:- For detailed product information, please contact sales. -: Standard Packing: -:- For detailed product information, please contact sales. -: Typical bulk packaging includes palletized plastic 5 gallon/25 kg. pails, fiber and steel drums to 1 ton super sacks in full container (FCL) or truck load (T/L) quantities. Research and sample quantities and hygroscopic, oxidizing or other air sensitive materials may be packaged under argon or vacuum. Solutions are packaged in polypropylene, plastic or glass jars up to palletized 3747 gallon liquid totes Special package is available on request. E FORUs’ is carefully handled to minimize damage during storage and transportation and to preserve the quality of our products in their original condition